RX 460 - Tom Clancy's Rainbow Six Siege bad performance

I have the Sapphire RX 460 2GB and in médium settings y get 40-30fps when it should be running better. Also the AMD ReLive Overlay is not working(when I press Shift+O it appears but flashes every half of secondand lags my pc).

BONUS: some days ago, I installed AMD OverDrive and after installing this, my Windows'd crashed and I had to reinstall it. I won't touch that software again